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A PowerShell script is simply a text file with a .ps1 extension that contains a list of commands PowerShell should execute. However, PowerShell's secure by default philosophy prevents all scripts from running, so double-clicking a PowerShell script from Windows Explorer won't execute it.
In shell scripting we often need to check if file or directory exists and take appropriate action. This post show you how to check it and how this check use in your script. For checking we will use file test operators -f for file and -d for directory, which return TRUE if file or directory exists. And here is output of the script.